org.apache.solr.search.function.EqualFunction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search.function;
import java.io.IOException;
import java.util.Objects;
import org.apache.lucene.queries.function.FunctionValues;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.valuesource.ComparisonBoolFunction;
/**
* Compares two values for equality.
* It should work on not only numbers but strings and custom things.
*
* @since 7.4
*/
public class EqualFunction extends ComparisonBoolFunction {
public EqualFunction(ValueSource lhs, ValueSource rhs, String name) {
super(lhs, rhs, name);
}
@Override
public boolean compare(int doc, FunctionValues lhs, FunctionValues rhs) throws IOException {
Object objL = lhs.objectVal(doc);
Object objR = rhs.objectVal(doc);
if (isNumeric(objL) && isNumeric(objR)) {
if (isInteger(objL) && isInteger(objR)) {
return Long.compare(((Number)objL).longValue(), ((Number)objR).longValue()) == 0;
} else {
return Double.compare(((Number)objL).doubleValue(), ((Number)objR).doubleValue()) == 0;
}
} else {
return Objects.equals(objL, objR);
}
}
private static boolean isInteger(Object obj) {
return obj instanceof Integer || obj instanceof Long;
}
private static boolean isNumeric(Object obj) {
return obj instanceof Number;
}
}